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 Mast tuning with a CDI furler		  New Topic  Topic Locked
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Sloop Smitten
Master Marine Consultant

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USA
1181 Posts
Initially Posted - 06/20/2008 :  11:57:52  Show Profile
The recent posts regarding mast tuning reminded me of a tuning aspect I have not seen addressed in this forum. I have a CDI furler that includes an extrusion that encases the fore stay. Before I installed it I measured the fore stay and back stay with a Loos gauge to benchmark the settings. I then counted how many turns of the fore stay turnbuckle it used for that tension. I installed the extrusion and set the turnbuckle according to the number of turns I had counted. I then adjusted the back stay to the pre-measured tension with the assumption that would tighten the fore stay to its appropriate measurement. At issue is I cannot measure the tension of the fore stay due to the installed extrusion. The mast seems true and I have had no problems with this setup however I was wondering how others have addressed this and whether anyone sees any problem with my methodology. I do not have an adjustable backstay. I would appreciate any insight.
Joe Wergers
Utopia
Fleet 7/Oceanside, CA
78 C25 FK/SR #381
Edited by - Sloop Smitten on 06/20/2008 12:11:10

Stardog
Captain

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USA
319 Posts
Response Posted - 06/20/2008 :  12:07:44  Show Profile
I think your methodology is sound. Your forestay tension should correspond to your backstay tension. To be sure of this, you can loosen your lowers to eliminate any tension they can induce, then measure your backstay. Once you're sure, tighten the lowers to the appropriate tension. You'll want to remove the jibsail while you're doing this as the weight will pull the mast forward and give a false reading.
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Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.